Cobblers for modifying shoes

Unlike tailors who can usually alter clothes as required to fit any person, there are few cobblers available who can modify a shoe to make it fit a person with a non standard foot. The problem is particularly severe for shoes from synthetic material like plastic or pvc which are made by moulding process, unlike handmade shoes which are stitched. So the shoe user is left with few options other than discarding the shoe, making selection of the right shoe important.